Method for preparing dendriticnano-silver quickly and conveniently

A nano-silver and dendritic technology, which is applied in the field of quick and easy preparation of dendritic nano-silver, can solve the problems of limited synthesis scale at the laboratory level, restrictions on dendritic nano-silver, and harsh synthesis conditions, so as to achieve convenient and rapid preparation and avoid Low requirements for preparation and purification process and preparation environment

Pending Publication Date: 2019-06-07
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing reports on the synthesis methods of dendritic nano-silver mainly include electrochemical methods and wet chemical methods, but these two methods either have relatively complicated operating procedures or harsh synthesis conditions, o

Method used

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  • Method for preparing dendriticnano-silver quickly and conveniently
  • Method for preparing dendriticnano-silver quickly and conveniently
  • Method for preparing dendriticnano-silver quickly and conveniently

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] 1g of silver nitrate, 4g of polyvinylpyrrolidone with a molecular weight of 3500, 3mg of sodium chloride and 100g of ethylene glycol were added to a 200mL two-necked flask, stirred and heated at 90°C for 1 hour, and then reacted at 130°C for 3 hours, After stopping the reaction, after the reaction liquid was naturally cooled, acetone was used for sedimentation, and then it was diluted three times with a 1% by weight aqueous solution of polyvinylpyrrolidone, and finally it was prepared into a dispersion liquid with ethylene glycol.

Example Embodiment

[0024] Example 2

[0025] 10g of silver nitrate, 30g of polyvinylpyrrolidone with a molecular weight of 8000, 20mg of sodium chloride and 1000g of ethylene glycol were added to a 2L two-necked flask, stirred and heated at 80°C for 1.5 hours, and then reacted at 120°C for 2.5 hours, After stopping the reaction, after the reaction liquid was naturally cooled, acetone was used for sedimentation, and then it was diluted three times with a 1% by weight aqueous solution of polyvinylpyrrolidone, and finally it was prepared into a dispersion liquid with ethylene glycol.

Example Embodiment

[0026] Example 3

[0027] 4g of silver nitrate, 7.2g of polyvinylpyrrolidone with a molecular weight of 40000, 10mg of sodium chloride and 400g of ethylene glycol were added to a 1L two-necked flask, stirred and heated at 100°C for 0.5 hours, and then reacted at 150°C for 2 hours , after the reaction is stopped, after the reaction solution is naturally cooled, acetone is used for sedimentation, and then it is diluted three times with 1% by weight aqueous solution of polyvinylpyrrolidone, and finally it is prepared into a dispersion liquid with ethylene glycol.

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Abstract

The invention belongs to the field of chemical synthesis, and discloses a method for preparing dendritic nano-silver quickly and conveniently. The method for preparing the dendritic nano-silver quickly and conveniently comprises the following steps that (1) polyvinylpyrrolidone, silver nitrate and sodium chloride are blended, dissolved in ethylene glycol, and uniformly stirred and mixed; (2) a piecewise heating reaction is conducted on the blended liquid being uniformly stirred and mixed in the step (1), reaction liquid obtained after the reaction is completed is purified, and the dendritic nano-silver is obtained. According to the method for preparing the dendritic nano-silver quickly and conveniently, tedious and complex preparation and purifying technologies in traditional preparation methods are avoided, requirements on the preparation environment are low, and the dendritic nano-silver can be prepared conveniently and quickly.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, in particular to a method for rapidly and conveniently preparing dendritic nano-silver. Background technique [0002] Because of its unique electrical and optical properties, nano-silver materials have been used in many electronic materials and electronic components and equipment in recent years. Among them, nano-silver particles are mostly used in antibacterial materials and conductive adhesives, and nano-silver wires are mostly used. In the transparent conductive film, the dendritic nano-silver, as a one-dimensional nano-material, not only has the characteristics of nano-silver wire bridging each other, but also has a unique topological structure, which can improve the connectivity rate of the nano-material in the conductive connection, avoiding the Nano-silver wires need to adjust the intersecting way of silver wires to improve the electrical conductivity when forming a film. This feature mak...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00
Inventor 胡继文张培魏彦龙涂园园林树东欧明黄振祝胡美龙
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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